Shared COT Uplink Scheduling for Unlicensed Band Access
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Solution Overview
Problem
In wireless communication systems using unlicensed frequency bands, user equipment faces increased access time due to channel detection processes, leading to inefficient resource utilization and delayed feedback, particularly for services sensitive to latency.
Innovation Solution
Implementing an electronic device that allows multiple user equipments to share a Channel Occupancy Time (COT) using orthogonal frequency domain resources, enabling them to access the unlicensed frequency band without individual channel detection and optimizing BWP utilization through resource indication mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each user equipment performs individual channel detection to access the unlicensed frequency band, then channel access reliability is improved, but access time is greatly increased
Solution Approach 1:
The patent merges the channel detection actions of multiple user equipments into a single joint detection process. The network side device coordinates multiple user equipments to perform channel detection simultaneously on the same channel, combining their detection results to determine channel availability. This approach maintains reliable channel access determination while significantly reducing the total access time compared to sequential individual detections.
2Reliability
If the network side device schedules BWP switching for user equipment, then communication reliability is improved, but switching complexity and time are increased
Solution Approach 1:
The patent enables user equipment to perform autonomous BWP switching based on pre-configured criteria and local measurements. Instead of requiring continuous network-side scheduling commands for each switching event, the user equipment autonomously monitors channel conditions and switches BWPs according to pre-established rules, reducing switching complexity and latency while maintaining communication reliability through configured fallback mechanisms.
3Adaptability or versatility
If multiple BWPs are configured but only one is activated at a time, then frequency domain resource utilization is improved, but resource utilization efficiency deteriorates due to idle BWPs
Solution Approach 1:
The patent implements dynamic BWP activation where multiple BWPs can be simultaneously activated based on real-time channel conditions and service requirements. The system dynamically adjusts the number and configuration of active BWPs, allowing user equipment to utilize multiple frequency domain resources concurrently when conditions permit, thereby improving overall resource utilization efficiency while maintaining the flexibility to activate only necessary BWPs under different scenarios.
Data Source
AI summary
An electronic device at a network side serves as a first user equipment and a second user equipment. The electronic device includes a processing circuit and is configured to: determine the second user equipment to share a channel occupy time (COT) of the first user equipment on a time domain, wherein the first user equipment and the second user equipment send uplink information to the electronic device in the COT of the first user equipment using orthogonal frequency domain resources; and generate frequency domain resource indication information of the second user equipment to indicate a frequency domain resource for the second user equipment.